Physics Constants

<TBODY>Name	Symbol	Value
Gravitational constant	G	6.673x10^-11 N*m^2/kg^2
Acceleration due to gravity	g	9.81 m/s^2
Speed of light in a vacuum	c	2.998x10^8 m/sec
Speed of sound at STP	-	3.31x10^2m/s
Mass-energy relationship	-	1 amu = 9.315 x10^2MeV
Mass of the Earth	-	5.97x10^24kg
Mass of the Moon	-	7.35x10^22kg
Mean radius of the earth	-	6.38 x10^6m
Mean radius of the Moon	-	1.74 x10^6m
Mean distance from Earth to Moon	-	3.84 x10^8m
Electrostatic constant	k	8.988x10^9 N*m^2/C^2
Charge of the electron	e	1.602x10^-19C
One Coulomb	C	6.25 x10^18 charges
Electronvolt	eV	1.602x10^-19J
Planck's Constant	h	6.626 x10^-34 J*s
Rest mass of the electron	me	9.109 x10 ^-31kg
Rest mass of the proton	mp	1.673 x10^-27kg
Rest mass of the neutron	mn	1.675x10-27 kg</TBODY>
Atomic mass unit	u	1.661 x10^-27 kg</TBODY>

Physics Properties of Substances

<TBODY>Absolute Indices of Refraction		Wavelengths of Light in a Vacuum
<TBODY>Substance	Index	<TBODY>Color	l (x10^-7 m)
Air	1.00	Violet	4.0-4.2
Alcohol	1.36	Blue	4.2-4.9
Diamond	2.42	Green	4.9-5.7
Glass,Crown/Flint	1.52-1.61	Yellow	5.7-5.9
Glycerol	1.47	Orange	5.9-6.5
Quartz, Fused	1.46	Red	6.5-7.0</TBODY>
Water	1.33</TBODY>	</TBODY>

Physics Equations

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	Mechanics vaverage= Dd/Dt vaverage = (vf + vi)/2 aaverage = (vf - vi)/t d = vit + ½ at^2 vf^2 = vi^2 + 2ad F = ma w = mg F = (Gm1m2)/d^2 p = mv I = FDt FDt = mDv Motion in a Plane viy = visin q vix = vicos q ac = v^2/r Fc = mv^2/r Energy W = FDd P = W/Dt = FDd/Dt DPE = mgDh KE = ½mv^2 F = kx PEs= ½kx^2 Internal Energy Q = mcDT Qf= mHf Qv= mHv Nuclear Energy E = mc^2 mf = mi/2^n	Symbols a = acceleration d = distance between centers F = force g = acceleration due to gravity G = universal gravitation constant I = impulse m = mass p = momentum d = displacement t = time v = velocity w = weight h = height k = spring constant KE = kinetic energy P = power PE = potential energy PEs = potential energy stored in spring W = work x = change in spring length from equilibrium position c= specific heat Hf= heat of fusion Hv = heat of vaporization Q = amount of heat D T = change in temperature Waves & Optics T = 1/f v = f l n = c/v sin qc = 1/n n1 sin q1 = n2 sinq2 n1v1=n2v2 l /d = x/L 1/do+ 1/di = 1/f So/Si = do/di </TBODY>	Electricity & Magnetism F=kq1q2/d^2 E = F/q V = W/q E = V/d I = Dq/Dt R = V/I P = VI = I^2R = V^2/R W = Pt =VIt =I^2Rt F=qvB V=Blv Series Circuits It = I1=I2=I3=... Vt=V1+V2+V3+... Rt=R1+R2+R3+... Parallel Circuits It=I1+I2+I3+... Vt=V1=V2=V3=... 1/Rt= 1/R1+1/R2+1/R3 +... Modern Physics Wo = hfo Ephoton = hf KEmax = hf - Wo p = h/l Ephoton = Ei - Ef	Symbols B = flux density F = force Ip = current in primary coil Is = current in secondary coil Np= # of turns of primary coil Ns= # of turns of secondary coil q = charge v = velocity Vp = voltage of primary coil Vs = voltage of secondary coil l = length of conductor V = electrical potential difference c=speed of light in a vacuum d = distance between slits f = frequency L = distance from slit to screen n = index of absolute refraction T = period v = speed q = angle qc = critical angle x = distance from center to 1^st maximum l = wavelength of light di= image distance do= object distance f = focal length So = object size Si = image size </TBODY>
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